一台宇通重工产高原型装载机在启封后出现制动不灵的故障。根据经验,这类故障应按先气路、后油路的顺序进行检查和排除。先查气路。启动发动机后,气压表压力逐渐上升,最高气压可达0.8 MPa,说明空气压缩机工件正常,管路也无漏气声。踏下制动踏板,也没有听见管路漏气声。松开踏板,放气阀排气,工作正常,因此气路故障可以排除。 A Yutong Heavy Industry-based plateau loader brake failure after opening failure. According to experience, such failures should be the first gas, after the order of the oil pipeline inspection and exclusion. First check airway. After starting the engine, the barometer pressure gradually increased, the maximum pressure up to 0.8 MPa, indicating the normal work of the air compressor, the pipeline is no leakage of sound. Depressed brake pedal, did not hear the pipe leakage. Loosen the pedal, exhaust valve exhaust, working properly, so gas fault can be ruled out.